Thank you HUI
You're so right! The data is static so no need to hold on to anything but the values and as you say I will keep the formula in the first or last of the rows - for next time I need to recalculate a new batch.
Brilliant, brilliant.
/loor
Need some advise from someone who has the black belt in excel.
Im preparing the main data for subsequent pivottabeling, but my data suffers from slow calculation due to the use of a series of COUNTIFS.
The COUNTIF is looking in a cell where week numbers have been set up in a string...